Get started with Boot Camp on Mac
You can use Boot Camp Assistant to install Windows 10 on your Mac.
Install Windows on your Mac
Depending on the model of your Mac, you might need an external USB drive to install Windows (you’re asked for one when you prepare your Mac for Windows if it’s required). Newer Mac models—with OS X 10.11 or later—use the internal drive to temporarily store the items you need to install Windows and don’t require a USB drive. To find out whether you need an external USB drive, see the Apple Support article Install Windows 10 on your Mac with Boot Camp Assistant.
To install Windows on your Mac, do one of the following:
Set the default operating system
After installing Windows, you can set the default operating system to either macOS or Windows. The default operating system is the one you want to use when you turn on or restart your Mac.
In macOS, choose Apple menu > System Preferences, then click Startup Disk.
Click the lock icon , type an administrator name and password, then click Unlock.
Select the startup disk that has the default operating system you want to use.
If you want to start up using the default operating system now, click Restart.
The next time you turn on or restart your Mac, it starts up using the default operating system.